Schuster, bleib bei deinem Leisten.
o Translation: Shoemaker, stick to your last.
o Meaning: Just do what you can do best.
o Meaning: Do not meddle in affairs or careers which are too high over your head or social standing.

Stadtluft macht frei.
o City air makes you free.
o Meaning: In medieval times peoples living in free cities were free from a sovereign. They were not bond-slaves like the people in rural areas. So living in a city – ´breathing city air´- meant to be free from bond-slavery to a sovereign. People living in cities could express their own opinion without being harassed. If people escaped to a free city and lived there for one year and one day, they were free of any previous bond to a sovereign.